Do you have a need for finding out what is taking up all the room on your server? Do you want to figure out what is eating up all your disk space. Of course there are different ways of doing this, for example the ls command.
e.g ls -al
will lists all the files in your directory and where applicable gives you a nice list of the files and directories. It will even show you the size of the files. e.g. if I want to list the following folder: